Coffee machine



FIG. 1 is a perspective view of a coffee machine;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dash-dot broken lines in the coffee maker represent boundaries of the claimed design and form no part of the claimed design. The lightened areas within the dash-dot broken lines form no part of the claimed design. 

CLAIM I claim the ornamental design for a coffee machine, as shown and described. 